-
Yes the same crittall ones, really wanted aluminium but it looks like that’s never going to happen, found a decent profile/system (Aluk or sheerline) which would be 12k but having had a site visit they need 5 stories of scaffolding and to cut back into the reveal for the added depth as there is zero sill projection outside and Dulwich estates say it has to be flush.
I haven’t had the full quote back yet but i’m guessing it’s going to be stratospheric and then plus a bit more as they probably don’t want to do it anyway.
I also have to pay Dulwich £400 just to apply.
As much as we want premier fenestration and insulation we are not blowing half the refurb budget on it. so plan B the cheaper option is a deep terrazzo sill (28-30cm) and the secondary glazing at about half way giving a usable windowsill.
As much as the existing windows look great the U value of single glazing is rubbish so a new deep sill will give us a trinket/plant shelf and help offset the not so pretty secondary panels.
Have seen a few where the secondary glazing is flush and it looks shit.
That wall is recessed and single skin not cavity like the others hence adding insulation out to the new sill depth.
The Mrs likes 23º so it’s insulation and Tado time as fuel is never going to get cheaper.
Mr_Smyth-
I think that's a sensible compromise!
-
Secondary glazing might slightly reduce the thermal bridging of the window reveal as well as improve the window bit, since it will be closer to the insulation. Assuming you aren't wrapping insulation around the reveal?
-
I replaced the panes in our Crittal windows to gas filled double glazed units. We were on the 6th floor and I did ask around but the response was that I’d need scaffolding, which was not cheap (it was also triple aspect). It was pretty straightforward, assuming you don’t mind leaning out of windows and handling big heavy panes of glass, it also cost @ £750 in glass and other stuff, made a big difference though. Obviously the one thing it doesn’t fix is the fact the frame itself is a cold bridge so we’d still get a ton of condensation on the frame. The price you pay for living in that kind of place.
leggy_blonde
hoefla
RodSaetan
Do you have the same single glazed windows and are you keeping them?
Because if yes then no, a thicker modern frame would likely fill out the gap at back if you moved the original terazzo into the room